Reptiles, a diverse group of air-respiratory Female Cockatiel Bird For Sale, vertebrates, are characterised by their scaly skin, amniotic eggs, and ectothermic (chilly-blooded) metabolism. They are ordinarily categorised into four residing orders: Crocodilia (crocodiles and alligators), Sphenodontia (tuataras), Squamata (lizards and snakes), and Te